D Wide Operating Voltage Range of 2 V to 6 V
D Outputs Can Drive Up To 10 LSTTL Loads
D Low Power Consumption, 80-µA Max ICC
D Typical tpd = 12 ns
D ±4-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Eight Flip-Flops With Single-Rail Outputs
D Clock Enable Latched to Avoid False
D Applications Include:
– Buffer/Storage Registers
– Shift Registers
– Pattern Generators
These devices are positive-edge-triggered octal
D-type flip-flops with an enable input. The ’HC377
devices are similar to the ’HC273 devices, but
feature a latched clock-enable (CLKEN) input
instead of a common clear.
Information at the data (D) inputs meeting the
setup time requirements is transferred to the
Q outputs on the positive-going edge of the clock
(CLK) pulse, if CLKEN is low. Clock triggering
occurs at a particular voltage level and is not
directly related to the transition time of the
positive-going pulse. When CLK is at either the
high or low level, the D input has no effect at the
output. These devices are designed to prevent
false clocking by transitions at CLKEN.
OCTAL DĆTYPE FLIPĆFLOPS
WITH CLOCK ENABLE
SCLS307B– JANUARY 1996 – REVISED JANUARY 2003
SN54HC377 . . . J OR W PACKAGE
SN74HC377 . . . DW, N, OR NS PACKAGE
SN54HC377 . . . FK PACKAGE
3 2 1 20 19
9 10 11 12 13
PDIP – N
–40°C to 85°C SOIC – DW
Tape and reel
SOP – NS
Tape and reel SN74HC377NSR
CDIP – J
–55°C to 125°C CFP – W
LCCC – FK
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2003, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.